/**
 *
 * 12345 => $12,345.00
 *
 * @param {String} sign
 * @param {Number} decimals Decimal places
 */

function currency(value, currency, decimals) {
  const digitsRE = /(\d{3})(?=\d)/g
  value = parseFloat(value)
  if (!isFinite(value) || (!value && value !== 0)) return ''
  currency = currency || '$'
  decimals = decimals || decimals === 0 ? decimals : 2
  const stringified = Math.abs(value).toFixed(decimals)
  const _int = decimals ? stringified.slice(0, -1 - decimals) : stringified
  const i = _int.length % 3
  const head = i > 0 ? _int.slice(0, i) + (_int.length > 3 ? ',' : '') : ''
  const _float = decimals ? stringified.slice(-1 - decimals) : ''
  const sign = value < 0 ? '-' : ''
  return sign + currency + head + _int.slice(i).replace(digitsRE, '$1,') + _float
}

export default currency
